package risoe.syslab.fhnew.gui;

/*
 * Copyright (c) 2012-2014, Technical University of Denmark (DTU)
 * All rights reserved.
 * 
 * The Flexhouse 2.0 platform ("this software") is licensed under the
 * BSD 3-clause license.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   - Neither the name of DTU nor the names of its contributors may be used to
 *     endorse or promote products derived from this software without specific
 *     prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE TECHNICAL UNIVERSITY OF DENMARK BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.concurrent.ConcurrentLinkedQueue;

import org.w3c.dom.NodeList;

import risoe.syslab.fhnew.controller.PluginController;
import risoe.syslab.fhnew.hw.Actuator;
import risoe.syslab.fhnew.hw.Sensor;
import risoe.syslab.model.CompositeMeasurement;

/**
 * Handles the default visualization for plugincontrollers by logging actuations and events to the SVG canvas
 * @author M. Svendsen
 */
public class DefaultPluginVisualizationHandler{
	public static final String SVG_PATH = "media/pluginDefaultVis.svg";
	private static final String TITLE_ID = "text3009-1";
	private static final String EVENTS_ID = "text3183-4-8";
	private static final String ACTUATIONS_ID = "text3183-4";
	private static final int MAX_LINES = 10;

	private PluginController mController;

	private ConcurrentLinkedQueue<String> mEvents = new ConcurrentLinkedQueue<String>();
	private ConcurrentLinkedQueue<String> mActuations = new ConcurrentLinkedQueue<String>();

	private boolean mInitialized = false;

	public DefaultPluginVisualizationHandler(PluginController controller) {
		mController = controller;
	}

	public void documentReady(){
		mInitialized = true;

		// Change the title of the visualization
		VisualizationUpdate update = new VisualizationUpdate(mController.getName());
		update.addCommand(TITLE_ID, mController.getName());
		mController.executeVisualizationUpdate(update);

		// Redraw lists
		synchronized(mEvents){
			redraw(mEvents, EVENTS_ID);
		}
		synchronized(mActuations){
			redraw(mActuations, ACTUATIONS_ID);
		}
	}

	public void onActuation(String name, CompositeMeasurement value){
		synchronized(mActuations){
			if (mActuations.size() >=  MAX_LINES){
				mActuations.poll();
			}
			mActuations.add(name+": "+value.value);

			// Request a redraw
			redraw(mActuations, ACTUATIONS_ID);
		}
	}

	public void onEvent(Object object){
		String name;
		double value;
		if (object instanceof Sensor){
			name = ((Sensor)object).getName();
			value = ((Sensor)object).getValue().value;
		}
		else{
			name = ((Actuator)object).getName();
			value = ((Actuator)object).getValue().value;
		}

		synchronized(mEvents){
			if (mEvents.size() >= MAX_LINES){
				mEvents.poll();
			}
			mEvents.add(name+": "+value);

			// Request a redraw
			redraw(mEvents, EVENTS_ID);
		}
	}

	private void redraw(ConcurrentLinkedQueue<String> list, String parentId){
		if (!mInitialized) return;

		VisualizationUpdate update = new VisualizationUpdate(mController.getName());
		// Construct string
		int i = 0;
		for (String string : list){
			// Get id
			NodeList nodes = mController.getDocument().getElementById(parentId).getChildNodes();
			String id = nodes.item(i).getAttributes().getNamedItem("id").getTextContent();
			update.addCommand(id, string);
			i++;
		}

		// Send command
		mController.executeVisualizationUpdate(update);
	}
}

